气候变化领域集成服务门户(CCPortal): Nitrogen-doped iron for selective catalytic reduction of nitrate to dinitrogen

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DOI	10.1016/j.scib.2020.02.015
	Nitrogen-doped iron for selective catalytic reduction of nitrate to dinitrogen
	Wang J.; Ling L.; Deng Z.; Zhang W.-X.
发表日期	2020
ISSN	20959273
起始页码	926
结束页码	933
卷号	65 期号:11
英文摘要	Nitrate is the leading cause of eutrophication worldwide and is one of the most challenging pollutants for restoration of polluted surface waters such as lakes, rivers and reservoirs. We report herein a new architecture of iron nanoparticles for high-efficiency denitrification by selective reduction of nitrate (NO3 −) to dinitrogen (N2). The iron nanoparticles are doped with nitrogen (FeN) and encapsulated within a thin layer of nitride-carbon (NC). The nanoparticles have high pyrrolic N content (17.4 at.%) and large specific surface area (2040 m2/g). Laboratory experiments demonstrated high N2 selectivity (91%) and nitrate removal capacity (6004 mg N/g Fe) for treatment of nitrate-containing water. This iron-based nanomaterial overcomes shortcomings of conventional catalysts by eliminating the use of precious and toxic heavy metals (e.g., Pd, Pt, Cu, Ni) and minimizing the generation of undesirable byproducts (e.g., ammonia) from the reactions with nanoscale zero-valent iron (nZVI). The multiple electron transfers process from NO3 − to N2 can be fine-tuned by adjusting the NC shell thickness. Superior electrocatalytic performance, low cost and minimal environmental impact of the iron-derived nanocatalyst offer promising prospects for water purification, waste treatment and environmental remediation. © 2020 Science China Press
关键词	Core-shell structure Electrocatalytic denitrification N2 selectivity Nitrogen-doped iron (FeN)nZVI
英文关键词	Ammonia; Denitrification; Doping (additives); Eutrophication; Heavy metals; Iron compounds; Lake pollution; Nanocatalysts; Nanoparticles; Nitrates; Nitrogen; Nitrogen removal; Reservoirs (water); River pollution; Selective catalytic reduction; Waste treatment; Wetlands; Core shell structure; Electrocatalytic; Electrocatalytic performance; Large specific surface areas; Multiple electron transfer; Nanoscale zero-valent iron; Nitrogen-doped; nZVI; Chemicals removal (water treatment)
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207207
作者单位	State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai, 200092, China
推荐引用方式 GB/T 7714	Wang J.,Ling L.,Deng Z.,et al. Nitrogen-doped iron for selective catalytic reduction of nitrate to dinitrogen[J],2020,65(11).
APA	Wang J.,Ling L.,Deng Z.,&Zhang W.-X..(2020).Nitrogen-doped iron for selective catalytic reduction of nitrate to dinitrogen.Science Bulletin,65(11).
MLA	Wang J.,et al."Nitrogen-doped iron for selective catalytic reduction of nitrate to dinitrogen".Science Bulletin 65.11(2020).